v0.13.0 doodads

doodads/azulian/Makefile

@@ -14,6 +14,11 @@ build:
 	doodad edit-doodad --tag "color=red" azu-red.doodad
 	doodad install-script azulian.js azu-red.doodad
 
+	doodad convert -t "White Azulian" white-front.png white-back.png \
+		white-wr{1,2,3,4}.png white-wl{1,2,3,4}.png azu-white.doodad
+	doodad edit-doodad --tag "color=white" azu-white.doodad
+	doodad install-script azulian.js azu-white.doodad
+
 	# Tag the category for these doodads
 	for i in *.doodad; do\
 		doodad edit-doodad --tag "category=creatures" $${i};\

doodads/azulian/azulian-red.js

@@ -1,43 +0,0 @@
-// Azulian (Red)
-// DEPRECATED: they both share azulian.js now.
-
-function main() {
-	var playerSpeed = 4;
-	var gravity = 4;
-	var Vx = Vy = 0;
-
-	var direction = "right";
-
-	Self.SetHitbox(0, 0, 32, 32)
-	Self.SetMobile(true);
-	Self.SetInventory(true);
-	Self.SetGravity(true);
-	Self.AddAnimation("walk-left", 100, ["red-wl1", "red-wl2", "red-wl3", "red-wl4"]);
-	Self.AddAnimation("walk-right", 100, ["red-wr1", "red-wr2", "red-wr3", "red-wr4"]);
-
-	// Sample our X position every few frames and detect if we've hit a solid wall.
-	var sampleTick = 0;
-	var sampleRate = 5;
-	var lastSampledX = 0;
-
-	setInterval(function () {
-		if (sampleTick % sampleRate === 0) {
-			var curX = Self.Position().X;
-			var delta = Math.abs(curX - lastSampledX);
-			if (delta < 5) {
-				direction = direction === "right" ? "left" : "right";
-			}
-			lastSampledX = curX;
-		}
-		sampleTick++;
-
-		// TODO: Vector() requires floats, pain in the butt for JS,
-		// the JS API should be friendlier and custom...
-		var Vx = parseFloat(playerSpeed * (direction === "left" ? -1 : 1));
-		Self.SetVelocity(Vector(Vx, 0.0));
-
-		if (!Self.IsAnimating()) {
-			Self.PlayAnimation("walk-" + direction, null);
-		}
-	}, 100);
-}

doodads/azulian/azulian.js

@@ -1,12 +1,29 @@
 // Azulian (Red and Blue)
-var playerSpeed = 12,
+
+const color = Self.GetTag("color");
+var playerSpeed = color === 'blue' ? 2 : 4,
+	swimSpeed = playerSpeed * 0.4,
+	aggroX = 250,  // X/Y distance sensitivity from player
+	aggroY = color === 'blue' ? 100 : 200,
+	jumpSpeed = color === 'blue' ? 14 : 18,
+	swimJumpSpeed = jumpSpeed * 0.4,
 	animating = false,
 	direction = "right",
 	lastDirection = "right";
 
+// white Azulian is faster yet than the red
+if (color === 'white') {
+	aggroX = 1000;
+	aggroY = 400;
+	playerSpeed = 8;
+	swimSpeed = playerSpeed * 0.4;
+	jumpSpeed = 20;
+	swimJumpSpeed = jumpSpeed * 0.4;
+}
+
 function setupAnimations(color) {
-	var left = color === 'blue' ? 'blu-wl' : 'red-wl',
-		right = color === 'blue' ? 'blu-wr' : 'red-wr',
+	let left = color === 'blue' ? 'blu-wl' : color + '-wl',
+		right = color === 'blue' ? 'blu-wr' : color + '-wr',
 		leftFrames = [left + '1', left + '2', left + '3', left + '4'],
 		rightFrames = [right + '1', right + '2', right + '3', right + '4'];
 
@@ -15,9 +32,11 @@ function setupAnimations(color) {
 }
 
 function main() {
-	var color = Self.GetTag("color");
 	playerSpeed = color === 'blue' ? 2 : 4;
 
+	let swimJumpCooldownTick = 0, // minimum Game Tick before we can jump while swimming
+		swimJumpCooldown = 10;    // CONFIG: delta of ticks between jumps while swimming
+
 	Self.SetMobile(true);
 	Self.SetGravity(true);
 	Self.SetInventory(true);
@@ -32,23 +51,77 @@ function main() {
 	// when it meets resistance.
 
 	// Sample our X position every few frames and detect if we've hit a solid wall.
-	var sampleTick = 0;
-	var sampleRate = 5;
-	var lastSampledX = 0;
-
-	setInterval(function () {
-		if (sampleTick % sampleRate === 0) {
-			var curX = Self.Position().X;
-			var delta = Math.abs(curX - lastSampledX);
-			if (delta < 5) {
-				direction = direction === "right" ? "left" : "right";
+	let sampleTick = 0;
+	let sampleRate = 5;
+	let lastSampledX = 0;
+
+	// Get the player on touch.
+	Events.OnCollide((e) => {
+		// If we're diving and we hit the player, game over!
+		// Azulians are friendly to Thieves though!
+		if (e.Settled && isPlayerFood(e.Actor)) {
+			FailLevel("Watch out for the Azulians!");
+			return;
+		}
+	});
+
+	setInterval(() => {
+		// If the player is nearby, walk towards them. Otherwise, default pattern
+		// is to walk back and forth.
+		let player = Actors.FindPlayer(),
+			followPlayer = false,
+			jump = false;
+
+		// Don't follow boring players.
+		if (player !== null && isPlayerFood(player)) {
+			let playerPt = player.Position(),
+				myPt = Self.Position();
+
+			// If the player is within aggro range, move towards.
+			if ((Math.abs(playerPt.X - myPt.X) < aggroX && Math.abs(playerPt.Y - myPt.Y) < aggroY)
+				|| (Level.Difficulty > 0)) {
+				direction = playerPt.X < myPt.X ? "left" : "right";
+				followPlayer = true;
+
+				if (playerPt.Y + player.Size().H < myPt.Y + Self.Size().H) {
+					jump = true;
+				}
+			}
+		}
+
+		// Default AI: sample position so we turn around on obstacles.
+		if (!followPlayer) {
+			if (sampleTick % sampleRate === 0) {
+				let curX = Self.Position().X;
+				let delta = Math.abs(curX - lastSampledX);
+				if (delta < 5) {
+					direction = direction === "right" ? "left" : "right";
+				}
+				lastSampledX = curX;
 			}
-			lastSampledX = curX;
+			sampleTick++;
 		}
-		sampleTick++;
 
-		var Vx = parseFloat(playerSpeed * (direction === "left" ? -1 : 1));
-		Self.SetVelocity(Vector(Vx, 0.0));
+		// Handle being underwater.
+		let canJump = Self.Grounded();
+		if (Self.IsWet()) {
+			let tick = GetTick();
+			if (tick > swimJumpCooldownTick) {
+				canJump = true;
+				swimJumpCooldownTick = tick + swimJumpCooldown;
+			}
+		}
+
+		// How speedy would our movement and jump be?
+		let xspeed = playerSpeed, yspeed = jumpSpeed;
+		if (Self.IsWet()) {
+			xspeed = swimSpeed;
+			yspeed = swimJumpSpeed;
+		}
+
+		let Vx = parseFloat(xspeed * (direction === "left" ? -1 : 1)),
+			Vy = jump && canJump ? parseFloat(-yspeed) : Self.GetVelocity().Y;
+		Self.SetVelocity(Vector(Vx, Vy));
 
 		// If we changed directions, stop animating now so we can
 		// turn around quickly without moonwalking.
@@ -61,12 +134,12 @@ function main() {
 		}
 
 		lastDirection = direction;
-	}, 100);
+	}, 10);
 }
 
 function playerControls() {
 	// Note: player speed is controlled by the engine.
-	Events.OnKeypress(function (ev) {
+	Events.OnKeypress((ev) => {
 		if (ev.Right) {
 			if (!Self.IsAnimating()) {
 				Self.PlayAnimation("walk-right", null);
@@ -81,3 +154,25 @@ function playerControls() {
 		}
 	})
 }
+
+// Logic to decide if the player is interesting to the Azulian (aka, if the Azulian
+// will be hostile towards the player). Boring players will not be chased after and
+// the Azulian will not harm them if they make contact.
+function isPlayerFood(actor) {
+	// Not a player or is invulnerable, or Peaceful difficulty.
+	if (!actor.IsPlayer() || actor.Invulnerable() || Level.Difficulty < 0) {
+		return false;
+	}
+
+	// On hard mode they are hostile to any player.
+	if (Level.Difficulty > 0) {
+		return true;
+	}
+
+	// Azulians are friendly to Thieves and other Azulians.
+	if (actor.Doodad().Filename === "thief.doodad" || actor.Doodad().Title.indexOf("Azulian") > -1) {
+		return false;
+	}
+
+	return true;
+}

doodads/bird/Makefile

@@ -2,9 +2,17 @@ ALL: build
 
 .PHONY: build
 build:
-	doodad convert -t "Bird (red)" left-1.png left-2.png right-1.png right-2.png \
-		dive-left.png dive-right.png bird-red.doodad
+	doodad convert -t "Bird (red)" red/left-1.png red/left-2.png red/right-1.png \
+		red/right-2.png red/dive-left.png red/dive-right.png \
+		bird-red.doodad
 	doodad install-script bird.js bird-red.doodad
+	doodad edit-doodad --tag "color=red" bird-red.doodad
+
+	doodad convert -t "Bird (blue)" blue/left-1.png blue/left-2.png blue/right-1.png \
+		blue/right-2.png blue/dive-left.png blue/dive-right.png \
+		bird-blue.doodad
+	doodad install-script bird.js bird-blue.doodad
+	doodad edit-doodad --tag "color=blue" bird-blue.doodad
 
 	# Tag the category for these doodads
 	for i in *.doodad; do\

doodads/bird/bird.js

@@ -1,18 +1,36 @@
-// Bird
+// Bird (red and blue)
 
-function main() {
-	var speed = 4;
-	var Vx = Vy = 0;
-	var altitude = Self.Position().Y; // original height in the level
-
-	var direction = "left",
-		lastDirection = "left";
-	var states = {
-		flying: 0,
-		diving: 1,
-	};
-	var state = states.flying;
+/*
+Base A.I. behaviors (red bird) are:
+
+- Tries to maintain original altitude in level and flies left/right.
+- Divebombs the player to attack, then climbs back to its original
+  altitude when it hits a floor/wall.
+
+Blue bird:
+
+- Flies in a sine wave pattern (its target altitude fluctuates
+  around the bird's original placement on the level).
+- Longer aggro radius to dive.
+*/
 
+let speed = 4,
+	Vx = Vy = 0,
+	color = Self.GetTag("color"), // informs our A.I. behaviors
+	searchStep = 12 // pixels to step while searching for a player
+	searchLimit = color === "blue" ? 24 : 12, // multiples of searchStep for aggro radius
+	altitude = Self.Position().Y, // original height in level
+	targetAltitude = altitude;    // bird's target height to maintain
+
+let direction = "left",
+	lastDirection = "left";
+let states = {
+	flying: 0,
+	diving: 1,
+};
+let state = states.flying;
+
+function main() {
 	Self.SetMobile(true);
 	Self.SetGravity(false);
 	Self.SetHitbox(0, 0, 46, 32);
@@ -24,33 +42,75 @@ function main() {
 		return player();
 	}
 
-	Events.OnCollide(function (e) {
-		if (e.Actor.IsMobile() && e.InHitbox) {
+	Events.OnCollide((e) => {
+		// If we're diving and we hit the player, game over!
+		if (e.Settled && state === states.diving && e.Actor.IsPlayer()) {
+			FailLevel("Watch out for birds!");
+			return;
+		}
+
+		if (e.Actor.IsMobile() && e.Actor.HasGravity() && e.InHitbox) {
 			return false;
 		}
 	});
 
 	// Sample our X position every few frames and detect if we've hit a solid wall.
-	var sampleTick = 0;
-	var sampleRate = 2;
-	var lastSampledX = 0;
-	var lastSampledY = 0;
+	let sampleTick = 0,
+		sampleRate = 2,
+		lastSampled = Point(0, 0);
+
+	setInterval(() => {
+		// Run blue bird A.I. if we are blue: moves our target altitude along a sine wave.
+		if (color === "blue") {
+			AI_BlueBird();
+		}
 
-	setInterval(function () {
+		// Sample how far we've moved to detect hitting a wall.
 		if (sampleTick % sampleRate === 0) {
-			var curX = Self.Position().X;
-			var delta = Math.abs(curX - lastSampledX);
+			let curP = Self.Position()
+			let delta = Math.abs(curP.X - lastSampled.X);
 			if (delta < 5) {
 				direction = direction === "right" ? "left" : "right";
 			}
-			lastSampledX = curX;
+
+			// If we were diving, check Y delta too for if we hit floor
+			if (state === states.diving && Math.abs(curP.Y - lastSampled.Y) < 5) {
+				state = states.flying;
+			}
+			lastSampled = curP
 		}
 		sampleTick++;
 
+		// Are we diving?
+		if (state === states.diving) {
+			Vy = speed
+		} else {
+			// If we are not flying at our original altitude, correct for that.
+			let curV = Self.Position();
+			Vy = 0.0;
+			if (curV.Y != targetAltitude) {
+				Vy = curV.Y < targetAltitude ? 1 : -1;
+			}
+
+			// Scan for the player character and dive.
+			try {
+				AI_ScanForPlayer()
+			} catch (e) {
+				console.error("Error in AI_ScanForPlayer: %s", e);
+			}
+		}
+
 		// TODO: Vector() requires floats, pain in the butt for JS,
 		// the JS API should be friendlier and custom...
-		var Vx = parseFloat(speed * (direction === "left" ? -1 : 1));
-		Self.SetVelocity(Vector(Vx, 0.0));
+		let Vx = parseFloat(speed * (direction === "left" ? -1 : 1));
+		Self.SetVelocity(Vector(Vx, Vy));
+
+		// If diving, exit - don't edit animation.
+		if (state === states.diving) {
+			Self.ShowLayerNamed("dive-" + direction);
+			lastDirection = direction;
+			return;
+		}
 
 		// If we changed directions, stop animating now so we can
 		// turn around quickly without moonwalking.
@@ -66,34 +126,149 @@ function main() {
 	}, 100);
 }
 
+// A.I. subroutine: scan for the player character.
+// The bird scans in a 45 degree angle downwards, if the
+// player is seen nearby in that scan it will begin a dive.
+// It's not hostile towards characters that can fly (having
+// no gravity).
+function AI_ScanForPlayer() {
+	// If Peaceful difficulty, do not attack.
+	if (Level.Difficulty < 0) {
+		return
+	}
+
+	let stepY = searchStep, // number of pixels to skip
+		stepX = stepY,
+		limit = stepX * searchLimit, // furthest we'll scan
+		scanX = scanY = 0,
+		size = Self.Size(),
+		fromPoint = Self.Position();
+
+	// From what point do we begin the scan?
+	if (direction === 'left') {
+		stepX = -stepX;
+		fromPoint.Y += size.H;
+	} else {
+		fromPoint.Y += size.H;
+		fromPoint.X += size.W;
+	}
+
+	scanX = fromPoint.X;
+	scanY = fromPoint.Y;
+
+	for (let i = 0; i < limit; i += stepY) {
+		scanX += stepX;
+		scanY += stepY;
+		for (let actor of Actors.At(Point(scanX, scanY))) {
+			if (actor.IsPlayer() && actor.HasGravity()) {
+				state = states.diving;
+				return;
+			}
+		}
+	}
+
+	return;
+}
+
+// Sine wave controls for the Blue bird.
+var sineLimit = 32,
+	sineCounter = 0,
+	sineDirection = 1,
+	sineFrequency = 5, // every 500ms
+	sineStep = 16;
+
+// A.I. Subroutine: sine wave pattern (Blue bird).
+function AI_BlueBird() {
+	// The main loop runs on a 100ms interval, control how frequently
+	// to adjust the bird's target velocity.
+	if (sineCounter > 0 && (sineCounter % sineFrequency) > 1) {
+		sineCounter++;
+		return;
+	}
+	sineCounter++;
+
+	targetAltitude += sineStep*sineDirection;
+
+	// Cap the distance between our starting altitude and sine-wave target.
+	if (targetAltitude < altitude && altitude - targetAltitude >= sineLimit) {
+		targetAltitude = altitude - sineLimit;
+		sineDirection = 1
+	} else if (targetAltitude > altitude && targetAltitude - altitude >= sineLimit) {
+		targetAltitude = altitude + sineLimit;
+		sineDirection = -1
+	}
+}
+
 // If under control of the player character.
 function player() {
-	Self.SetInventory(true);
-	Events.OnKeypress(function (ev) {
+	let playerSpeed = 12,
+		diving = false,
+		falling = false;
+
+	// The player can dive by moving downwards and laterally, but
+	// de-cheese their ability to just sweep across the ground; if
+	// they aren't seen to be moving downwards, cancel the dive.
+	let lastPoint = Self.Position();
+	setInterval(() => {
+		let nowAt = Self.Position();
+		if (nowAt.Y > lastPoint.Y) {
+			falling = true;
+		} else {
+			falling = false;
+		}
+		lastPoint = nowAt;
+	}, 100);
+
+	Events.OnKeypress((ev) => {
 		Vx = 0;
 		Vy = 0;
 
-		if (ev.Up) {
-			Vy = -playerSpeed;
-		} else if (ev.Down) {
-			Vy = playerSpeed;
+		if (ev.Right) {
+			direction = "right";
+		} else if (ev.Left) {
+			direction = "left";
 		}
 
-		if (ev.Right) {
+		// Dive!
+		if (ev.Down && ev.Right && falling) {
+			Self.StopAnimation();
+			Self.ShowLayerNamed("dive-right");
+			diving = falling;
+		} else if (ev.Down && ev.Left && falling) {
+			Self.StopAnimation();
+			Self.ShowLayerNamed("dive-left");
+			diving = falling;
+		} else if (ev.Right) {
+			// Fly right.
 			if (!Self.IsAnimating()) {
 				Self.PlayAnimation("fly-right", null);
 			}
 			Vx = playerSpeed;
+			diving = false;
 		} else if (ev.Left) {
+			// Fly left.
 			if (!Self.IsAnimating()) {
 				Self.PlayAnimation("fly-left", null);
 			}
 			Vx = -playerSpeed;
+			diving = false;
 		} else {
-			Self.StopAnimation();
-			animating = false;
+			// Hover in place.
+			if (!Self.IsAnimating()) {
+				Self.PlayAnimation("fly-" + direction);
+			}
+			diving = false;
 		}
 
-		Self.SetVelocity(Vector(Vx, Vy));
-	})
-}
+		// Player is invulnerable while diving.
+		Self.SetInvulnerable(diving);
+	});
+
+	Events.OnCollide((e) => {
+		// If the player is diving at an enemy mob, destroy it.
+		if (diving && e.Settled && e.Actor.IsMobile() && !e.Actor.Invulnerable()) {
+			Sound.Play("crumbly-break.wav");
+			e.Actor.Destroy();
+		}
+	});
+}

doodads/box/box.js

@@ -1,23 +1,32 @@
 // Pushable Box.
-var speed = 4;
-var size = 75;
+
+const speed = 4,
+    size = 75;
 
 function main() {
     Self.SetMobile(true);
+    Self.SetInvulnerable(true);
     Self.SetGravity(true);
     Self.SetHitbox(0, 0, size, size);
 
-    Events.OnCollide(function (e) {
+    Events.OnCollide((e) => {
         // Ignore events from neighboring Boxes.
         if (e.Actor.Actor.Filename === "box.doodad") {
             return false;
         }
 
         if (e.Actor.IsMobile() && e.InHitbox) {
-            var overlap = e.Overlap;
+            let overlap = e.Overlap;
 
             if (overlap.Y === 0 && !(overlap.X === 0 && overlap.W < 5) && !(overlap.X === size)) {
-                // Standing on top, ignore.
+                // Be sure to position them snug on top.
+                // TODO: this might be a nice general solution in the
+                // collision detector...
+                e.Actor.MoveTo(Point(
+                    e.Actor.Position().X,
+                    Self.Position().Y - e.Actor.Hitbox().Y - e.Actor.Hitbox().H - 2,
+                ))
+                e.Actor.SetGrounded(true);
                 return false;
             } else if (overlap.Y === size) {
                 // From the bottom, boop it up.
@@ -39,8 +48,8 @@ function main() {
     });
 
     // When we receive power, we reset to our original position.
-    var origPoint = Self.Position();
-    Message.Subscribe("power", function (powered) {
+    let origPoint = Self.Position();
+    Message.Subscribe("power", (powered) => {
         Self.MoveTo(origPoint);
         Self.SetVelocity(Vector(0, 0));
     });
@@ -52,8 +61,8 @@ function main() {
 function animate() {
     Self.AddAnimation("animate", 100, [0, 1, 2, 3, 2, 1]);
 
-    var running = false;
-    setInterval(function () {
+    let running = false;
+    setInterval(() => {
         if (!running) {
             running = true;
             Self.PlayAnimation("animate", function () {
@@ -61,4 +70,4 @@ function animate() {
             })
         }
     }, 100);
-}
+}

doodads/boy/Makefile

@@ -5,6 +5,8 @@ build:
 	doodad convert -t "Boy" stand-right.png stand-left.png \
 		walk-right-1.png walk-right-2.png walk-right-3.png \
 		walk-left-1.png walk-left-2.png walk-left-3.png \
+		idle-right-1.png idle-right-2.png idle-right-3.png \
+		idle-left-1.png idle-left-2.png idle-left-3.png \
 		boy.doodad
 	doodad install-script boy.js boy.doodad
 

doodads/boy/boy.js

@@ -1,38 +1,62 @@
-function main() {
-	var playerSpeed = 12;
-	var gravity = 4;
-	var Vx = Vy = 0;
+const playerSpeed = 12;
 
-	var animating = false;
-	var animStart = animEnd = 0;
-	var animFrame = animStart;
+let Vx = Vy = 0,
+	walking = false,
+	direction = "right",
+	lastDirection = direction;
 
+function main() {
 	Self.SetMobile(true);
 	Self.SetInventory(true);
 	Self.SetGravity(true);
 	Self.SetHitbox(0, 0, 32, 52);
 	Self.AddAnimation("walk-left", 200, ["stand-left", "walk-left-1", "walk-left-2", "walk-left-3", "walk-left-2", "walk-left-1"]);
 	Self.AddAnimation("walk-right", 200, ["stand-right", "walk-right-1", "walk-right-2", "walk-right-3", "walk-right-2", "walk-right-1"]);
+	Self.AddAnimation("idle-left", 200, ["idle-left-1", "idle-left-2", "idle-left-3", "idle-left-2"]);
+	Self.AddAnimation("idle-right", 200, ["idle-right-1", "idle-right-2", "idle-right-3", "idle-right-2"]);
+
+	// If the player suddenly changes direction, reset the animation state to quickly switch over.
+	let lastVelocity = Vector(0, 0);
 
-	Events.OnKeypress(function (ev) {
+	Events.OnKeypress((ev) => {
 		Vx = 0;
 		Vy = 0;
 
+		let curVelocity = Self.GetVelocity();
+		if ((lastVelocity.X < 0 && curVelocity.X > 0) ||
+			(lastVelocity.X > 0 && curVelocity.X < 0)) {
+			Self.StopAnimation();
+		}
+		lastVelocity = curVelocity;
+		lastDirection = direction;
+
+		let wasWalking = walking;
 		if (ev.Right) {
-			if (!Self.IsAnimating()) {
-				Self.PlayAnimation("walk-right", null);
-			}
+			direction = "right";
 			Vx = playerSpeed;
+			walking = true;
 		} else if (ev.Left) {
-			if (!Self.IsAnimating()) {
-				Self.PlayAnimation("walk-left", null);
-			}
+			direction = "left";
 			Vx = -playerSpeed;
+			walking = true;
 		} else {
+			// Has stopped walking!
+			walking = false;
+			stoppedWalking = true;
+		}
+
+		// Should we stop animating? (changed state)
+		if (direction !== lastDirection || wasWalking !== walking) {
 			Self.StopAnimation();
-			animating = false;
 		}
 
-		// Self.SetVelocity(Point(Vx, Vy));
+		// And play what animation?
+		if (!Self.IsAnimating()) {
+			if (walking) {
+				Self.PlayAnimation("walk-"+direction, null);
+			} else {
+				Self.PlayAnimation("idle-"+direction, null);
+			}
+		}
 	})
 }

doodads/build.sh

@@ -34,6 +34,10 @@ doors() {
 	cd doors/
 	make
 	cd ..
+
+	cd gems/
+	make
+	cd ..
 }
 
 trapdoors() {
@@ -84,6 +88,16 @@ warpdoor() {
 	cd ..
 }
 
+creatures() {
+	cd snake/
+	make
+	cd ..
+
+	cd crusher/
+	make
+	cd ..
+}
+
 boy
 buttons
 switches
@@ -94,6 +108,7 @@ mobs
 objects
 onoff
 warpdoor
+creatures
 doodad edit-doodad -quiet -lock -author "Noah" ../../assets/doodads/*.doodad
 doodad edit-doodad ../../assets/doodads/azu-blu.doodad
 doodad edit-doodad -hide ../../assets/doodads/boy.doodad

doodads/buttons/button.js

@@ -1,19 +1,26 @@
 function main() {
-	var timer = 0;
-	var pressed = false;
+	let timer = 0;
+	let pressed = false;
 
 	// Has a linked Sticky Button been pressed permanently down?
-	var stickyDown = false;
-	Message.Subscribe("sticky:down", function(down) {
+	let stickyDown = false;
+	Message.Subscribe("sticky:down", (down) => {
 		stickyDown = down;
 		Self.ShowLayer(stickyDown ? 1 : 0);
 	});
 
-	Events.OnCollide(function(e) {
+	// Track who all is colliding with us.
+	let colliders = {};
+
+	Events.OnCollide((e) => {
 		if (!e.Settled) {
 			return;
 		}
 
+		if (colliders[e.Actor.ID()] == undefined) {
+			colliders[e.Actor.ID()] = true;
+		}
+
 		// If a linked Sticky Button is pressed, button stays down too and
 		// doesn't interact.
 		if (stickyDown) {
@@ -37,12 +44,17 @@ function main() {
 		}
 
 		Self.ShowLayer(1);
-		timer = setTimeout(function() {
+	});
+
+	Events.OnLeave((e) => {
+		delete colliders[e.Actor.ID()];
+
+		if (Object.keys(colliders).length === 0 && !stickyDown) {
 			Sound.Play("button-up.wav")
 			Self.ShowLayer(0);
 			Message.Publish("power", false);
 			timer = 0;
 			pressed = false;
-		}, 200);
+		}
 	});
 }

doodads/buttons/sticky.js

@@ -1,8 +1,8 @@
 function main() {
-	var pressed = false;
+	let pressed = false;
 
 	// When a sticky button receives power, it pops back up.
-	Message.Subscribe("power", function (powered) {
+	Message.Subscribe("power", (powered) => {
 		if (powered && pressed) {
 			Self.ShowLayer(0);
 			pressed = false;
@@ -12,7 +12,7 @@ function main() {
 		}
 	})
 
-	Events.OnCollide(function (e) {
+	Events.OnCollide((e) => {
 		if (!e.Settled) {
 			return;
 		}

doodads/crumbly-floor/crumbly-floor.js

@@ -6,19 +6,16 @@ function main() {
 	Self.AddAnimation("fall", 100, ["fall1", "fall2", "fall3", "fall4"]);
 
 	// Recover time for the floor to respawn.
-	var recover = 5000;
+	let recover = 5000;
 
 	// States of the floor.
-	var stateSolid = 0;
-	var stateShaking = 1;
-	var stateFalling = 2;
-	var stateFallen = 3;
-	var state = stateSolid;
+	let stateSolid = 0;
+	let stateShaking = 1;
+	let stateFalling = 2;
+	let stateFallen = 3;
+	let state = stateSolid;
 
-	// Started the animation?
-	var startedAnimation = false;
-
-	Events.OnCollide(function(e) {
+	Events.OnCollide((e) => {
 
 		// If the floor is falling, the player passes right thru.
 		if (state === stateFalling || state === stateFallen) {
@@ -40,15 +37,15 @@ function main() {
 			// Begin the animation sequence if we're in the solid state.
 			if (state === stateSolid) {
 				state = stateShaking;
-				Self.PlayAnimation("shake", function() {
+				Self.PlayAnimation("shake", () => {
 					state = stateFalling;
-					Self.PlayAnimation("fall", function() {
+					Self.PlayAnimation("fall", () => {
 						Sound.Play("crumbly-break.wav")
 						state = stateFallen;
 						Self.ShowLayerNamed("fallen");
 
 						// Recover after a while.
-						setTimeout(function() {
+						setTimeout(() => {
 							Self.ShowLayer(0);
 							state = stateSolid;
 						}, recover);

doodads/crusher/Makefile

@@ -0,0 +1,14 @@
+ALL: build
+
+.PHONY: build
+build:
+	doodad convert -t "Crusher" sleep.png peek-left.png peek-right.png \
+		angry.png ouch.png crusher.doodad
+	doodad install-script crusher.js crusher.doodad
+
+	# Tag the category for these doodads
+	for i in *.doodad; do\
+		doodad edit-doodad --tag "category=creatures" $${i};\
+	done
+
+	cp *.doodad ../../../assets/doodads/

doodads/crusher/crusher.js

@@ -0,0 +1,207 @@
+// Crusher
+
+/*
+A.I. Behaviors:
+
+- Sleeps and hangs in the air in a high place.
+- When a player gets nearby, it begins "peeking" in their direction.
+- When the player is below, tries to drop and crush them or any
+  other mobile doodad.
+- The top edge is safe to walk on and ride back up like an elevator.
+*/
+
+let direction = "left",
+    dropSpeed = 12,
+    riseSpeed = 4,
+    watchRadius = 300, // player nearby distance to start peeking
+    fallRadius = 120,   // player distance before it drops
+    helmetThickness = 48, // safe solid hitbox height
+    fireThickness = 12,   // dangerous bottom thickness
+    targetAltitude = Self.Position()
+    lastAltitude = targetAltitude.Y
+    size = Self.Size();
+
+const states = {
+    idle: 0,
+    peeking: 1,
+    drop: 2,
+    falling: 3,
+    hit: 4,
+    rising: 5,
+};
+let state = states.idle;
+
+function main() {
+	Self.SetMobile(true);
+    Self.SetGravity(false);
+    Self.SetInvulnerable(true);
+	Self.SetHitbox(5, 2, 90, 73);
+    Self.AddAnimation("hit", 50,
+        ["angry", "ouch", "angry", "angry", "angry", "angry",
+         "sleep", "sleep", "sleep", "sleep", "sleep", "sleep",
+         "sleep", "sleep", "sleep", "sleep", "sleep", "sleep",
+         "sleep", "sleep", "sleep", "sleep", "sleep", "sleep"],
+    )
+
+	// Player Character controls?
+	if (Self.IsPlayer()) {
+		return player();
+	}
+
+    let hitbox = Self.Hitbox();
+
+	Events.OnCollide((e) => {
+        // The bottom is deadly if falling.
+        if (state === states.falling || state === states.hit && e.Settled) {
+            if (e.Actor.IsMobile() && e.InHitbox && !e.Actor.Invulnerable()) {
+                if (e.Overlap.H > 72) {
+                    if (e.Actor.IsPlayer()) {
+                        FailLevel("Don't get crushed!");
+                        return;
+                    } else {
+                        e.Actor.Destroy();
+                    }
+                }
+            }
+        }
+
+        // Our top edge is always solid.
+        if (e.Actor.IsPlayer() && e.InHitbox) {
+            if (e.Overlap.Y < helmetThickness) {
+                // Be sure to position them snug on top.
+                // TODO: this might be a nice general solution in the
+                // collision detector...
+                e.Actor.MoveTo(Point(
+                    e.Actor.Position().X,
+                    Self.Position().Y - e.Actor.Hitbox().Y - e.Actor.Hitbox().H,
+                ))
+                e.Actor.SetGrounded(true);
+            }
+        }
+
+        // The whole hitbox is ordinarily solid.
+        if (state !== state.falling) {
+            if (e.Actor.IsMobile() && e.InHitbox) {
+                return false;
+            }
+        }
+	});
+
+	setInterval(() => {
+		// Find the player.
+        let player = Actors.FindPlayer(),
+            playerPoint = player.Position(),
+            point = Self.Position(),
+            delta = 0,
+            nearby = false,
+            below = false;
+
+        // Face the player.
+        if (playerPoint.X < point.X + (size.W / 2)) {
+            direction = "left";
+            delta = Math.abs(playerPoint.X - (point.X + (size.W/2)));
+        }
+        else if (playerPoint.X > point.X + (size.W / 2)) {
+            direction = "right";
+            delta = Math.abs(playerPoint.X - (point.X + (size.W/2)));
+        }
+
+        if (delta < watchRadius) {
+            nearby = true;
+        }
+        if (delta < fallRadius) {
+            // Check if the player is below us.
+            if (playerPoint.Y > point.Y + size.H) {
+                below = true;
+            }
+        }
+
+        switch (state) {
+            case states.idle:
+                if (nearby) {
+                    Self.ShowLayerNamed("peek-"+direction);
+                } else {
+                    Self.ShowLayerNamed("sleep");
+                }
+
+                if (below) {
+                    state = states.drop;
+                } else if (nearby) {
+                    state = states.peeking;
+                }
+
+                break;
+            case states.peeking:
+                if (nearby) {
+                    Self.ShowLayerNamed("peek-"+direction);
+                } else {
+                    state = states.idle;
+                    break;
+                }
+
+                if (below) {
+                    state = states.drop;
+                }
+
+                break;
+            case states.drop:
+                // Begin the fall.
+                Self.ShowLayerNamed("angry");
+                Self.SetVelocity(Vector(0.0, dropSpeed));
+                lastAltitude = -point.Y;
+                state = states.falling;
+            case states.falling:
+                Self.ShowLayerNamed("angry");
+                Self.SetVelocity(Vector(0.0, dropSpeed));
+
+                // Landed?
+                if (point.Y === lastAltitude) {
+                    Sound.Play("crumbly-break.wav")
+                    state = states.hit;
+                    Self.PlayAnimation("hit", () => {
+                        state = states.rising;
+                    });
+                }
+                break;
+            case states.hit:
+                // A transitory state while the hit animation
+                // plays out.
+                break;
+            case states.rising:
+                Self.ShowLayerNamed("sleep");
+                Self.SetVelocity(Vector(0, -riseSpeed));
+
+                point = Self.Position();
+                if (point.Y <= targetAltitude.Y+4 || point.Y === lastAltitude.Y) {
+                    Self.MoveTo(targetAltitude);
+                    Self.SetVelocity(Vector(0, 0))
+                    state = states.idle;
+                }
+        }
+
+        lastAltitude = point.Y;
+	}, 100);
+}
+
+// If under control of the player character.
+function player() {
+	Events.OnKeypress((ev) => {
+		if (ev.Right) {
+			direction = "right";
+		} else if (ev.Left) {
+			direction = "left";
+		}
+
+        // Jump!
+        if (ev.Down) {
+            Self.ShowLayerNamed("angry");
+            return;
+        } else if (ev.Right && ev.Left) {
+            Self.ShowLayerNamed("ouch");
+        } else if (ev.Right || ev.Left) {
+            Self.ShowLayerNamed("peek-"+direction);
+        } else {
+            Self.ShowLayerNamed("sleep");
+        }
+	});
+}

doodads/doors/colored-door.js

@@ -1,9 +1,11 @@
-function main() {
-	var color = Self.GetTag("color");
-	var keyname = color === "small" ? "small-key.doodad" : "key-" + color + ".doodad";
+// Colored Locked Doors.
+
+const color = Self.GetTag("color"),
+	keyname = color === "small" ? "small-key.doodad" : "key-" + color + ".doodad";
 
+function main() {
 	// Layers in the doodad image.
-	var layer = {
+	let layer = {
 		closed: 0,
 		unlocked: 1,
 		right: 2,
@@ -11,13 +13,13 @@ function main() {
 	};
 
 	// Variables that change in event handler.
-	var unlocked = false;  // Key has been used to unlock the door (one time).
-	var opened = false;    // If door is currently showing its opened state.
-	var enterSide = 0;     // Side of player entering the door, -1 or 1, left or right.
+	let unlocked = false;  // Key has been used to unlock the door (one time).
+	let opened = false;    // If door is currently showing its opened state.
+	let enterSide = 0;     // Side of player entering the door, -1 or 1, left or right.
 
 	Self.SetHitbox(34, 0, 13, 76);
 
-	Events.OnCollide(function(e) {
+	Events.OnCollide((e) => {
 		// Record the side that this actor has touched us, in case the door
 		// needs to open.
 		if (enterSide === 0) {
@@ -37,7 +39,7 @@ function main() {
 			}
 
 			// Do they have our key?
-			var hasKey = e.Actor.HasItem(keyname) >= 0;
+			let hasKey = e.Actor.HasItem(keyname) >= 0;
 			if (!hasKey) {
 				// Door is locked.
 				return false;
@@ -55,7 +57,7 @@ function main() {
 			}
 		}
 	});
-	Events.OnLeave(function(e) {
+	Events.OnLeave((e) => {
 		Self.ShowLayer(unlocked ? layer.unlocked : layer.closed);
 		// Sound.Play("door-close.wav")
 

doodads/doors/electric-door.js

@@ -1,27 +1,28 @@
-var animating = false;
-var opened = false;
-var powerState = false;
+// Electric Door
+
+let animating = false;
+let opened = false;
+let powerState = false;
 
 // Function to handle the door opening or closing.
 function setPoweredState(powered) {
 	powerState = powered;
 
-	console.log("setPoweredState: %+v", powered)
 	if (powered) {
 		if (animating || opened) {
 			return;
 		}
 
 		animating = true;
+		opened = true;
 		Sound.Play("electric-door.wav")
-		Self.PlayAnimation("open", function() {
-			opened = true;
+		Self.PlayAnimation("open", () => {
 			animating = false;
 		});
 	} else {
 		animating = true;
 		Sound.Play("electric-door.wav")
-		Self.PlayAnimation("close", function() {
+		Self.PlayAnimation("close", () => {
 			opened = false;
 			animating = false;
 		})
@@ -32,7 +33,6 @@ function main() {
 	Self.AddAnimation("open", 100, [0, 1, 2, 3]);
 	Self.AddAnimation("close", 100, [3, 2, 1, 0]);
 
-
 	Self.SetHitbox(0, 0, 34, 76);
 
 	// A linked Switch that activates the door will send the Toggle signal
@@ -40,14 +40,13 @@ function main() {
 	// state on this signal, and ignore the very next Power signal. Ordinary
 	// power sources like Buttons will work as normal, as they emit only a power
 	// signal.
-	var ignoreNextPower = false;
-	Message.Subscribe("switch:toggle", function(powered) {
-		console.log("A switch powered %+v, setPoweredState(%+v) to opposite", powered, powerState);
+	let ignoreNextPower = false;
+	Message.Subscribe("switch:toggle", (powered) => {
 		ignoreNextPower = true;
 		setPoweredState(!powerState);
 	})
 
-	Message.Subscribe("power", function(powered) {
+	Message.Subscribe("power", (powered) => {
 		if (ignoreNextPower) {
 			ignoreNextPower = false;
 			return;
@@ -56,7 +55,7 @@ function main() {
 		setPoweredState(powered);
 	});
 
-	Events.OnCollide(function(e) {
+	Events.OnCollide((e) => {
 		if (e.InHitbox) {
 			if (!opened) {
 				return false;

doodads/doors/keys.js

@@ -1,10 +1,18 @@
-function main() {
-	var color = Self.GetTag("color");
-	var quantity = color === "small" ? 1 : 0;
+// Colored Keys and Small Key
+
+const color = Self.GetTag("color"),
+	quantity = color === "small" ? 1 : 0;
 
-	Events.OnCollide(function (e) {
+function main() {
+	Events.OnCollide((e) => {
 		if (e.Settled) {
 			if (e.Actor.HasInventory()) {
+				// If we don't have a quantity, and the actor already has
+				// one of us, don't pick it up so the player can get it.
+				if (quantity === 0 && e.Actor.HasItem(Self.Filename) === 0 && !e.Actor.IsPlayer()) {
+					return;
+				}
+
 				Sound.Play("item-get.wav")
 				e.Actor.AddItem(Self.Filename, quantity);
 				Self.Destroy();

doodads/doors/locked-door.js

@@ -1,27 +0,0 @@
-// DEPRECATED: old locked door script. Superceded by colored-door.js.
-function main() {
-	Self.AddAnimation("open", 0, [1]);
-	var unlocked = false;
-	var color = Self.GetTag("color");
-
-	Self.SetHitbox(16, 0, 32, 64);
-
-	Events.OnCollide(function(e) {
-		if (unlocked) {
-			return;
-		}
-
-		if (e.InHitbox) {
-			var data = e.Actor.GetData("key:" + color);
-			if (data === "") {
-				// Door is locked.
-				return false;
-			}
-
-			if (e.Settled) {
-				unlocked = true;
-				Self.PlayAnimation("open", null);
-			}
-		}
-	});
-}

doodads/gems/Makefile

@@ -0,0 +1,58 @@
+ALL: build
+
+.PHONY: build
+build:
+	###
+	# Gemstones
+	###
+
+	doodad convert -t "Gemstone (Green)" green-1.png green-2.png green-3.png green-4.png \
+		gem-green.doodad
+	doodad install-script gemstone.js gem-green.doodad
+	doodad edit-doodad --tag "color=green" gem-green.doodad
+
+	doodad convert -t "Gemstone (Red)" red-1.png red-2.png red-3.png red-4.png \
+		gem-red.doodad
+	doodad install-script gemstone.js gem-red.doodad
+	doodad edit-doodad --tag "color=red" gem-red.doodad
+
+	doodad convert -t "Gemstone (Blue)" blue-1.png blue-2.png blue-3.png blue-4.png \
+		gem-blue.doodad
+	doodad install-script gemstone.js gem-blue.doodad
+	doodad edit-doodad --tag "color=blue" gem-blue.doodad
+
+	doodad convert -t "Gemstone (Yellow)" yellow-1.png yellow-2.png yellow-3.png yellow-4.png \
+		gem-yellow.doodad
+	doodad install-script gemstone.js gem-yellow.doodad
+	doodad edit-doodad --tag "color=yellow" gem-yellow.doodad
+
+	###
+	# Totems
+	###
+
+	doodad convert -t "Gemstone Totem (Green)" totem-green-1.png totem-green-2.png totem-green-3.png \
+		totem-green-4.png totem-green-0.png gem-totem-green.doodad
+	doodad install-script totem.js gem-totem-green.doodad
+	doodad edit-doodad --tag "color=green" gem-totem-green.doodad
+
+	doodad convert -t "Gemstone Totem (Yellow)" totem-yellow-1.png totem-yellow-2.png totem-yellow-3.png \
+		totem-yellow-4.png totem-yellow-0.png gem-totem-yellow.doodad
+	doodad install-script totem.js gem-totem-yellow.doodad
+	doodad edit-doodad --tag "color=yellow" gem-totem-yellow.doodad
+
+	doodad convert -t "Gemstone Totem (Blue)" totem-blue-1.png totem-blue-2.png totem-blue-3.png \
+		totem-blue-4.png totem-blue-0.png gem-totem-blue.doodad
+	doodad install-script totem.js gem-totem-blue.doodad
+	doodad edit-doodad --tag "color=blue" gem-totem-blue.doodad
+
+	doodad convert -t "Gemstone Totem (Red)" totem-red-1.png totem-red-2.png totem-red-3.png \
+		totem-red-4.png totem-red-0.png gem-totem-red.doodad
+	doodad install-script totem.js gem-totem-red.doodad
+	doodad edit-doodad --tag "color=red" gem-totem-red.doodad
+
+	# Tag the category for these doodads
+	for i in *.doodad; do\
+		doodad edit-doodad --tag "category=doors" $${i};\
+	done
+
+	cp *.doodad ../../../assets/doodads/

doodads/gems/gemstone.js

@@ -0,0 +1,24 @@
+// Gem stone collectibles/keys.
+
+const color = Self.GetTag("color"),
+    shimmerFreq = 1000;
+
+function main() {
+	Self.SetMobile(true);
+	Self.SetGravity(true);
+
+    Self.AddAnimation("shimmer", 100, [0, 1, 2, 3, 0]);
+	Events.OnCollide((e) => {
+		if (e.Settled) {
+			if (e.Actor.HasInventory()) {
+				Sound.Play("item-get.wav")
+				e.Actor.AddItem(Self.Filename, 1);
+				Self.Destroy();
+			}
+		}
+	});
+
+    setInterval(() => {
+        Self.PlayAnimation("shimmer", null);
+    }, shimmerFreq);
+}

doodads/gems/totem.js

@@ -0,0 +1,100 @@
+// Gem stone totem socket.
+
+/*
+The Totem is a type of key-door that holds onto its corresponding
+Gemstone. When a doodad holding the right Gemstone touches the
+totem, the totem takes the gemstone and activates.
+
+If the Totem is not linked to any other Totems, it immediately
+sends a power(true) signal upon activation.
+
+If the Totem is linked to other Totems, it waits until all totems
+have been activated before it will emit a power signal. Only one
+such totem needs to be linked to e.g. an Electric Door - no matter
+which totem is solved last, they'll all emit a power signal when
+all of their linked totems are activated.
+*/
+
+let color = Self.GetTag("color"),
+    keyname = "gem-"+color+".doodad",
+    activated = false,
+    linkedReceiver = false, // is linked to a non-totem which might want power
+    totems = {}, // linked totems
+    shimmerFreq = 1000;
+
+function main() {
+    // Show the hollow socket on level load (last layer)
+    Self.ShowLayer(4);
+
+    // Find any linked totems.
+    for (let link of Self.GetLinks()) {
+        if (link.Filename.indexOf("gem-totem") > -1) {
+            totems[link.ID()] = false;
+        } else {
+            linkedReceiver = true;
+        }
+    }
+
+    // Shimmer animation is just like the gemstones: first 4 frames
+    // are the filled socket sprites.
+    Self.AddAnimation("shimmer", 100, [0, 1, 2, 3, 0]);
+
+	Events.OnCollide((e) => {
+        if (activated) return;
+
+		if (e.Actor.IsMobile() && e.Settled) {
+            // Do they have our gemstone?
+            let hasKey = e.Actor.HasItem(keyname) >= 0;
+            if (!hasKey) {
+                return;
+            }
+
+            // Take the gemstone.
+            e.Actor.RemoveItem(keyname, 1);
+			Self.ShowLayer(0);
+
+            // Emit to our linked totem neighbors.
+            activated = true;
+            Message.Publish("gem-totem:activated", Self.ID());
+            tryPower();
+		}
+	});
+
+    Message.Subscribe("gem-totem:activated", (totemId) => {
+        totems[totemId] = true;
+        tryPower();
+    })
+
+    setInterval(() => {
+        if (activated) {
+            Self.PlayAnimation("shimmer", null);
+        }
+    }, shimmerFreq);
+}
+
+// Try to send a power signal for an activated totem.
+function tryPower() {
+    // Only emit power if we are linked to something other than a totem.
+    if (!linkedReceiver) {
+        return;
+    }
+
+    // Can't if any of our linked totems aren't activated.
+    try {
+        for (let totemId of Object.keys(totems)) {
+            if (totems[totemId] === false) {
+                return;
+            }
+        }
+    } catch(e) {
+        console.error("Caught: %s", e);
+    }
+
+    // Can't if we aren't powered.
+    if (activated === false) {
+        return;
+    }
+
+    // Emit power!
+    Message.Publish("power", true);
+}

doodads/objects/anvil.js

@@ -6,11 +6,12 @@ function main() {
     Self.SetHitbox(0, 0, 48, 25);
     Self.SetMobile(true);
     Self.SetGravity(true);
+    Self.SetInvulnerable(true);
 
     // Monitor our Y position to tell if we've been falling.
-    var lastPoint = Self.Position();
-    setInterval(function () {
-        var nowAt = Self.Position();
+    let lastPoint = Self.Position();
+    setInterval(() => {
+        let nowAt = Self.Position();
         if (nowAt.Y > lastPoint.Y) {
             falling = true;
         } else {
@@ -19,7 +20,7 @@ function main() {
         lastPoint = nowAt;
     }, 100);
 
-    Events.OnCollide(function (e) {
+    Events.OnCollide((e) => {
         if (!e.Settled) {
             return;
         }
@@ -33,7 +34,7 @@ function main() {
                     FailLevel("Watch out for anvils!");
                     return;
                 }
-                else if (e.Actor.IsMobile()) {
+                else if (e.Actor.IsMobile() && !e.Actor.Invulnerable()) {
                     // Destroy mobile doodads.
                     Sound.Play("crumbly-break.wav");
                     e.Actor.Destroy();
@@ -43,8 +44,8 @@ function main() {
     });
 
     // When we receive power, we reset to our original position.
-    var origPoint = Self.Position();
-    Message.Subscribe("power", function (powered) {
+    let origPoint = Self.Position();
+    Message.Subscribe("power", (powered) => {
         Self.MoveTo(origPoint);
         Self.SetVelocity(Vector(0, 0));
     });

doodads/objects/checkpoint-flag.js

@@ -1,17 +1,28 @@
 // Checkpoint Flag.
-var isCurrentCheckpoint = false;
+var isCurrentCheckpoint = false,
+    playerEntered = false
+    broadcastCooldown = time.Now();
 
 function main() {
     Self.SetHitbox(22 + 16, 16, 75 - 16, 86);
     setActive(false);
 
+    // If the checkpoint is linked to any doodad, the player character will
+    // become that doodad when they cross this checkpoint.
+    let skin = null;
+    for (let actor of Self.GetLinks()) {
+        skin = actor.Filename;
+        actor.Destroy();
+    }
+
     // Checkpoints broadcast to all of their peers so they all
     // know which one is the most recently activated.
-    Message.Subscribe("broadcast:checkpoint", function (currentID) {
+    Message.Subscribe("broadcast:checkpoint", (currentID) => {
         setActive(false);
+        return "a ok";
     });
 
-    Events.OnCollide(function (e) {
+    Events.OnCollide((e) => {
         if (!e.Settled) {
             return;
         }
@@ -21,10 +32,19 @@ function main() {
             return;
         }
 
-        // Set the player checkpoint.
         SetCheckpoint(Self.Position());
         setActive(true);
-        Message.Broadcast("broadcast:checkpoint", Self.ID())
+
+        // Don't spam the PubSub queue or we get races and deadlocks.
+        if (time.Now().After(broadcastCooldown)) {
+            Message.Broadcast("broadcast:checkpoint", Self.ID());
+            broadcastCooldown = time.Now().Add(5 * time.Second)
+        }
+
+        // Are we setting a new player skin?
+        if (skin && e.Actor.Doodad().Filename !== skin) {
+            Actors.SetPlayerCharacter(skin);
+        }
     });
 }
 
@@ -35,4 +55,4 @@ function setActive(v) {
 
     isCurrentCheckpoint = v;
     Self.ShowLayerNamed(v ? "checkpoint-active" : "checkpoint-inactive");
-}
+}

doodads/objects/exit-flag.js

@@ -2,7 +2,7 @@
 function main() {
 	Self.SetHitbox(22 + 16, 16, 75 - 16, 86);
 
-	Events.OnCollide(function (e) {
+	Events.OnCollide((e) => {
 		if (!e.Settled) {
 			return;
 		}

doodads/objects/start-flag.js

@@ -4,8 +4,7 @@ function main() {
 
     // Linking a doodad to the Start Flag sets the
     // player character. Destroy the original doodads.
-    var links = Self.GetLinks();
-    for (var i = 0; i < links.length; i++) {
-        links[i].Destroy();
+    for (var link of Self.GetLinks()) {
+        link.Destroy();
     }
 }

doodads/on-off/state-block-blue.js

@@ -3,9 +3,9 @@ function main() {
 	Self.SetHitbox(0, 0, 42, 42);
 
 	// Blue block is ON by default.
-	var state = true;
+	let state = true;
 
-	Message.Subscribe("broadcast:state-change", function(newState) {
+	Message.Subscribe("broadcast:state-change", (newState) => {
 		state = !newState;
 
 		// Layer 0: ON
@@ -13,7 +13,7 @@ function main() {
 		Self.ShowLayer(state ? 0 : 1);
 	});
 
-	Events.OnCollide(function(e) {
+	Events.OnCollide((e) => {
 		if (e.Actor.IsMobile() && e.InHitbox) {
 			if (state) {
 				return false;

doodads/on-off/state-block-orange.js

@@ -3,9 +3,9 @@ function main() {
 	Self.SetHitbox(0, 0, 42, 42);
 
 	// Orange block is OFF by default.
-	var state = false;
+	let state = false;
 
-	Message.Subscribe("broadcast:state-change", function(newState) {
+	Message.Subscribe("broadcast:state-change", (newState) => {
 		state = newState;
 
 		// Layer 0: OFF
@@ -13,7 +13,7 @@ function main() {
 		Self.ShowLayer(state ? 1 : 0);
 	});
 
-	Events.OnCollide(function(e) {
+	Events.OnCollide((e) => {
 		if (e.Actor.IsMobile() && e.InHitbox) {
 			if (state) {
 				return false;

doodads/on-off/state-button.js

@@ -1,23 +1,23 @@
 // State Block Control Button
 
 // Button is "OFF" by default.
-var state = false;
+let state = false;
 
 function main() {
 	Self.SetHitbox(0, 0, 42, 42);
 
 	// When the button is activated, don't keep toggling state until we're not
 	// being touched again.
-	var colliding = false;
+	let colliding = false;
 
 	// If we receive a state change event from a DIFFERENT on/off button, update
 	// ourself to match the state received.
-	Message.Subscribe("broadcast:state-change", function(value) {
+	Message.Subscribe("broadcast:state-change", (value) => {
 		state = value;
 		showSprite();
 	});
 
-	Events.OnCollide(function(e) {
+	Events.OnCollide((e) => {
 		if (colliding) {
 			return false;
 		}
@@ -40,7 +40,7 @@ function main() {
 		return false;
 	});
 
-	Events.OnLeave(function(e) {
+	Events.OnLeave((e) => {
 		colliding = false;
 	})
 }

doodads/regions/Makefile

@@ -23,7 +23,16 @@ build:
 	doodad convert -t "Power Source" power-64.png power-source.doodad
 	doodad install-script power.js power-source.doodad
 
+	# Warp Door
+	doodad convert -t "Invisible Warp Door" warp-door-64.png reg-warp-door.doodad
+	doodad edit-doodad --tag "color=invisible" reg-warp-door.doodad
+	doodad install-script ../warp-door/warp-door.js reg-warp-door.doodad
+
+	# Reset Level Timer
+	doodad convert -t "Reset Level Timer" timer-64.png reg-reset-timer.doodad
+	doodad install-script reset-timer.js reg-reset-timer.doodad
+
 	for i in *.doodad; do\
 		doodad edit-doodad --tag "category=technical" $${i};\
 	done
-	cp *.doodad ../../../assets/doodads/
+	cp *.doodad ../../../assets/doodads/

doodads/regions/checkpoint.js

@@ -8,11 +8,11 @@ function main() {
 
     // Checkpoints broadcast to all of their peers so they all
     // know which one is the most recently activated.
-    Message.Subscribe("broadcast:checkpoint", function (currentID) {
+    Message.Subscribe("broadcast:checkpoint", (currentID) => {
         setActive(false);
     });
 
-    Events.OnCollide(function (e) {
+    Events.OnCollide((e) => {
         if (isCurrentCheckpoint || !e.Settled) {
             return;
         }
@@ -35,4 +35,4 @@ function setActive(v) {
     }
 
     isCurrentCheckpoint = v;
-}
+}